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Finding the Fourth Proportional to 662,672.43, 914,366.48 and 390,825.39

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Solution

The fourth proportional to 662,672.43, 914,366.48 and 390,825.39 is: 539,267.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,672.43 : 914,366.48 = 390,825.39 : x
  2. Step 2: Convert to fraction form
    662,672.43/914,366.48 = 390,825.39/x
  3. Step 3: Cross multiply
    662,672.43x = 914,366.48 × 390,825.39
  4. Step 4: Simplify right side
    662,672.43x = 357,357,634,194.80
  5. Step 5: Solve for x
    x = 357,357,634,194.80/662,672.43
  6. Step 6: Final answer
    x = 539,267.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.